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- Parkes_process abstract "The Parkes process is a pyrometallurgical industrial process for removing silver from lead, during the production of bullion. It is an example of liquid-liquid extraction.The process takes advantage of two liquid-state properties of zinc. The first is that zinc is immiscible with lead, and the other is that silver is 3000 times more soluble in zinc than it is in lead. When zinc is added to liquid lead that contains silver as a contaminant, the silver preferentially migrates into the zinc. Because the zinc is immiscible in the lead it remains in a separate layer and is easily removed. The zinc-silver solution is then heated until the zinc vaporizes, leaving nearly pure silver. If gold is present in the liquid lead, it can also be removed and isolated by the same process.The process was patented by Alexander Parkes in 1850. Parkes received two additional patents in 1852.The Parkes process was not adapted in the United States, due to the low native production of lead. In the beginning the separation of zinc and silver was difficult. The problems were overcome during the 1880s and by 1923 only the Parkes process was used.".
- Parkes_process wikiPageID "1625876".
- Parkes_process wikiPageRevisionID "592748143".
- Parkes_process hasPhotoCollection Parkes_process.
- Parkes_process subject Category:Lead.
- Parkes_process subject Category:Metallurgical_processes.
- Parkes_process subject Category:Silver.
- Parkes_process type Abstraction100002137.
- Parkes_process type Act100030358.
- Parkes_process type Activity100407535.
- Parkes_process type Event100029378.
- Parkes_process type MetallurgicalProcesses.
- Parkes_process type Procedure101023820.
- Parkes_process type PsychologicalFeature100023100.
- Parkes_process type YagoPermanentlyLocatedEntity.
- Parkes_process comment "The Parkes process is a pyrometallurgical industrial process for removing silver from lead, during the production of bullion. It is an example of liquid-liquid extraction.The process takes advantage of two liquid-state properties of zinc. The first is that zinc is immiscible with lead, and the other is that silver is 3000 times more soluble in zinc than it is in lead. When zinc is added to liquid lead that contains silver as a contaminant, the silver preferentially migrates into the zinc.".
- Parkes_process label "Metoda Parkesa".
- Parkes_process label "Parkes process".
- Parkes_process label "Parkes-Verfahren".
- Parkes_process sameAs Parkes-Verfahren.
- Parkes_process sameAs Metoda_Parkesa.
- Parkes_process sameAs m.05hpyy.
- Parkes_process sameAs Q2052689.
- Parkes_process sameAs Q2052689.
- Parkes_process sameAs Parkes_process.
- Parkes_process wasDerivedFrom Parkes_process?oldid=592748143.
- Parkes_process isPrimaryTopicOf Parkes_process.